Jolla -- pronounced "yo-la," not "joller" or "holler" -- is the name of the phone and the Finnish company that makes it. It has a 4.5-inch screen, a dual-core chip, 16GB of storage expandable via microSD, 4G, an 8-megapixel camera and a battery you can replace yourself.

Sailfish is "Android app compliant," which hints you'll be able to install standard Android apps on it. Jolla hasn't explained what this means in practice, but it sounds like you'll be able to sideload apps from Google Play, and that it'll be very easy for Android developers to translate their wares to Sailfish.

If you plop down 100 euros ($128) for a pre-order, you'll help fund the mobile's production and bag an exclusive "other half." Jolla doesn't explain what that means, but from the phone's split design I'm guessing it's the removable backplate, like fashion-forward Nokias of old.